Stable, Single-Mode Oscillation with High-Order Volume Mode at 1 MW, 170 GHz Gyrotron.

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  • Sakamoto Keishi
    Department of Fusion Engineering Research, Naka Fusion Research Establishment, Japan Atomic Energy Research Institute, Naka–machi, Ibaraki–ken 311–01
  • Kasugai Atsushi
    Department of Fusion Engineering Research, Naka Fusion Research Establishment, Japan Atomic Energy Research Institute, Naka–machi, Ibaraki–ken 311–01
  • Takahashi Koji
    Department of Fusion Engineering Research, Naka Fusion Research Establishment, Japan Atomic Energy Research Institute, Naka–machi, Ibaraki–ken 311–01
  • Tsuneoka Masaki
    Department of Fusion Engineering Research, Naka Fusion Research Establishment, Japan Atomic Energy Research Institute, Naka–machi, Ibaraki–ken 311–01
  • Imai Tsuyoshi
    Department of Fusion Engineering Research, Naka Fusion Research Establishment, Japan Atomic Energy Research Institute, Naka–machi, Ibaraki–ken 311–01
  • Kariya Tsuyoshi
    Electron Tube & Devices Division, Toshiba Co., Ohtawara–shi, Tochigi 324
  • Hayashi Kenichi
    R&D Center, Toshiba Co., Ukishima, Kawasaki–shi, Kanagawa 210

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  • Stable Single-Mode Oscillation with Hig

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Abstract

A stable, 1.13, MW single-mode oscillation was obtained at 170, GHz in a short-pulse gyrotron with a high-order volume mode TE31, 8. The maximum efficiency was 30 %, and no power degradation due to mode competition was observed. This result indicates the potential for the development of a 170, GHz, 1, MW, CW gyrotron which is required for electron cyclotron heating and current drive of large fusion devices.

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